Rated 4 out of 5 stars

My only nit is that it's impossible to know what folder you are dropping a message on to. In case anyone would like "drag and drop feedback" to indicate which folder you are dropping a message into, here's my userChrome.css. Too bad for me that it took 2 hours of digging to realize that I needed to have "!important" in the rule!

/* * Do not remove the @namespace line -- it's required for correct functioning */@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */